I read about the route and loved it so since I live in Serbia now, I took days off work( May 18th-22) and it was amazing. In the AM I was in Kranjska Gora and by the evening I was at the seaside in Portoroz all taking side roads. This pass did meet all my expectations and then some.The scenery around SOCA river is also amazing/ I am already planing next year. A route I would recommend to everybody.

Corners on the north side are cobble stones, on the south side its all tarmac but with a fair bit of subsidence which demands your attention at all times.
A nice cafe at the top serving local food, see photo for multilingual menu